<s>
Redmine	B-Operating_System
is	O
a	O
free	B-Application
and	I-Application
open	I-Application
source	I-Application
,	O
web-based	O
project	O
management	O
and	O
issue	B-Application
tracking	I-Application
tool	I-Application
.	O
</s>
<s>
It	O
features	O
per	O
project	O
wikis	B-Protocol
and	O
forums	O
,	O
time	O
tracking	O
,	O
and	O
flexible	O
,	O
role-based	O
access	O
control	O
.	O
</s>
<s>
It	O
includes	O
a	O
calendar	O
and	O
Gantt	B-Application
charts	I-Application
to	O
aid	O
visual	O
representation	O
of	O
projects	O
and	O
their	O
deadlines	O
.	O
</s>
<s>
Redmine	B-Operating_System
integrates	O
with	O
various	O
version	B-Architecture
control	I-Architecture
systems	I-Architecture
and	O
includes	O
a	O
repository	B-General_Concept
browser	O
and	O
diff	B-Application
viewer	O
.	O
</s>
<s>
The	O
design	O
of	O
Redmine	B-Operating_System
is	O
significantly	O
influenced	O
by	O
Trac	B-Language
,	O
a	O
software	O
package	O
with	O
some	O
similar	O
features	O
.	O
</s>
<s>
Redmine	B-Operating_System
is	O
written	O
using	O
the	O
Ruby	B-Application
on	I-Application
Rails	I-Application
framework	O
.	O
</s>
<s>
Redmine	B-Operating_System
's	O
features	O
include	O
the	O
following	O
:	O
</s>
<s>
Allows	O
Web	B-General_Concept
feeds	I-General_Concept
and	O
e-mail	O
notifications	O
.	O
</s>
<s>
,	O
there	O
were	O
more	O
than	O
80	O
major	O
Redmine	B-Operating_System
installations	O
worldwide	O
.	O
</s>
<s>
Among	O
the	O
users	O
of	O
Redmine	B-Operating_System
is	O
Ruby	B-Language
.	O
</s>
<s>
In	O
2015	O
,	O
Redmine	B-Operating_System
was	O
the	O
most	O
popular	O
open	O
source	O
project	O
planning	O
tool	O
.	O
</s>
<s>
Following	O
concerns	O
with	O
the	O
way	O
the	O
feedback	O
and	O
patches	O
from	O
the	O
Redmine	B-Operating_System
community	O
were	O
being	O
handled	O
a	O
group	O
of	O
Redmine	B-Operating_System
developers	O
created	O
a	O
fork	B-Application
of	O
the	O
project	O
in	O
February	O
2011	O
.	O
</s>
<s>
The	O
fork	B-Application
was	O
initially	O
named	O
Bluemine	O
,	O
but	O
changed	O
to	O
ChiliProject	O
.	O
</s>
<s>
After	O
the	O
leader	O
of	O
the	O
fork	B-Application
moved	O
on	O
from	O
ChiliProject	O
in	O
2012	O
and	O
development	O
and	O
maintenance	O
had	O
been	O
announced	O
to	O
shut	O
down	O
,	O
the	O
project	O
was	O
officially	O
discontinued	O
in	O
February	O
2015	O
.	O
</s>
<s>
Another	O
fork	B-Application
of	O
ChiliProject	O
called	O
OpenProject	B-Protocol
is	O
active	O
since	O
2015	O
.	O
</s>
